Which of the following characteristics of benzene is INCORRECT?*1 pointThe benzene ring is planar.The benzene ring is stabilised by the delocalisation of π electrons.All C-C and C=C bonds in the benzene ring have the same length.The benzene ring reacts by nucleophilic aromatic substitution reaction.
Question
Which of the following characteristics of benzene is INCORRECT?*1 pointThe benzene ring is planar.The benzene ring is stabilised by the delocalisation of π electrons.All C-C and C=C bonds in the benzene ring have the same length.The benzene ring reacts by nucleophilic aromatic substitution reaction.
Solution
The incorrect characteristic of benzene is: "The benzene ring reacts by nucleophilic aromatic substitution reaction."
Explanation:
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The benzene ring is indeed planar. This is due to the sp2 hybridization of the carbon atoms in the ring, which results in a planar structure.
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The benzene ring is also stabilized by the delocalization of π electrons. This is a key characteristic of aromatic compounds, which allows them to have extra stability compared to other compounds.
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All C-C and C=C bonds in the benzene ring do have the same length. This is because the electrons in the π system are delocalized, meaning they are not associated with a single pair of atoms. This results in a bond length that is intermediate between a single and a double bond.
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However, benzene does not typically undergo nucleophilic aromatic substitution reactions. This is because the high electron density of the aromatic ring repels the electron-rich nucleophile. Instead, benzene primarily undergoes electrophilic aromatic substitution reactions, where an electron-poor electrophile is attracted to the electron-rich aromatic ring.
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